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Watson 009
Basic information Name: Watson 009
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2009
Country: Australia
Mass:help 1 g
Meteoritical Bulletin:  MB 99  (2011)  H5
Recommended:  H5    [explanation]

This is 1 of 10318 approved meteorites (plus 18 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 26 Oct 2010
Writeup from MB 99:

Watson 009        30°30’S, 131°41’E

South Australia, Australia

Found: 10 May 2009

Classification: Ordinary chondrite (H5)

History: K L. Bell found one piece, on the Nullarbor Plain.

Physical characteristics: Small (1.4 x 1.1 x 0.5 cm) dark brown, rusty specimen weighs 1.0 g. There is no obvious fusion crust or chondrules evident on the exterior. Small chondrules are best observed on a freshly cut surface.

Petrography: (Kim Lai N. Bell, Monash). Readily delineated chondrules lie within a heavily stained matrix, which makes it difficult to ascertain weather or not the matrix has been recrystallized. Chondrules range in size from 0.1-1 mm, with an average diameter of 0.5 mm and types include PO, POP, RP, BO and GOP. Mineralogy is typically chondritic and includes olivine, pyroxene, Fe-Ni metal and sulfides. Both olivine and pyroxenes have straight to undulose extinctions plus irregular fracturing. Metals (~11%), taenite and kamacite, as well as troilite (4%), occur as irregularly shaped grains that have been heavily replaced by oxides (96%).

Geochemistry: EMPA (wt%) Olivine: SiO2 = 39.17, TiO2 = 0.01, Al2O3 = 0.01, FeO = 17.26, MnO = 0.49, MgO = 43.29, CaO = 0.01, Na2O = 0.01, K2O = 0.00, (Fa = 18.28 mol%, σ = 0.09, n = 6). Low-Ca pyroxene: SiO2 = 56.15, TiO2 = 0.13, Al2O3 = 0.33, FeO = 10.96, MnO = 0.52, MgO = 31.01, CaO = 0.69, Na2O = 0.02, K2O = 0.01, (Fs = 16.27 mol%, σ = 0.19, n= 7). Kamacite: Ni = 6.88, Co = 0.33. Troilite: Ni = 0.00-0.82.

Classification: Ordinary chondrite (H5, S2, W4).

Specimens: Sample and one thin section held by A. Tomkins at Monash.

Data from:
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor
Date:10 May 2009
Mass (g):1
Shock stage:S3
Weathering grade:W4
Fayalite (mol%):18.3
Ferrosilite (mol%):16.3
Classifier:K.-L.N. Bell
Type spec mass (g):1
Type spec location:Monash
Main mass:Monash
Finder:K.-L. N. Bell
Comments:Submitted by K.-L.N. Bell, A. Tomkins
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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     Recommended::   (30° 30'S, 131° 41'E)

     This is 1 of 239 approved meteorites from South Australia, Australia (plus 2 unapproved names) (plus 4 impact craters)
     This is 1 of 715 approved meteorites from Australia (plus 45 unapproved names) (plus 27 impact craters)
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